Apple has released a revised third beta of macOS 15 Sequoia to developers for testing, which includes new features like iPhone Mirroring, window tiling options, and a Passwords app. The beta can be accessed by registered developers through the Software Update section with an Apple Developer account. macOS Sequoia will also incorporate Apple Intelligence features from iOS 18, such as Writing Tools and an Image Playground, later in the beta testing process. The new update will also introduce custom emoji or "Genmoji", enhancements to Siri's capabilities, and improvements to apps like Safari and Notes. A public beta version of macOS Sequoia is expected to be available for testing in July. This beta version promises improved user experience and innovative tools for users to test and provide feedback on.